2 ms·

> I really hope Apple brings the same charge limiting to iPhone as well. This was added to iPhones in 2019. > If your iPhone stops charging at 80%, it's most

> I really hope Apple brings the same charge limiting to iPhone as well. This was added to iPhones in 2019. > If your iPhone stops charging at 80%, it's most likely due to a feature Apple introduced in iOS 13 called Optimized Battery Charging. It aims to prevent over-stressing the battery and hence extend the battery life of your iPhone by limiting the charge to 80%. Your iPhone learns your usage patterns and delays 100% charging until moments before you wake up in the morning. https://www.makeuseof.com/why-your-iphone-stops-charging-at-80-percent/ https://www.makeuseof.com/why-your-iphone-stops-charging-at-...

vladvasiliu 3y ago
It's a bit different, though. I don't often need my iphone to last multiple days on end. Yet, if I keep it plugged in as often as I'm sitting at a desk, it'll never go below 80%. If I get it below 80%, sooner or later, it will figure "i want to use it" and will charge it all the way to 100%. The lowest my battery ever got on this phone was 40 something when I was away for a weekend without a charger. It's very rare I use it a lot, so the "intelligence" clearly doesn't care how long the battery needs to last. The way it's implemented on my mom's android, it always shows 80 or 85% (can't recall which one it is), even if she leaves it plugged in for the whole weekend. On my HP laptop, if I activate the "battery saver mode" (as opposed to "AI"), it reports the maximum capacity as somewhere around 80% of the design capacity. I don't know whether Linux cooperates with this, but probably not. HP only talks about OS compatibility for the "AI" mode, which not only requires Windows but a specific HP app.
- GeekyBear 3y ago
  > It's a bit different, though. Yes. It learns your normal waking time (if you have one) and gives you a full charge before you wake up. Which is what I want. A full charge for the working day, without needlessly shortening the batteries functional lifetime.
  - vladvasiliu 3y ago
    Sure, but if I know I won't drain my battery more than 10% that day, I can't tell it not to top it up more than 80%. That's the case for me 99.9% of days. This also seems to work only if you've drained the battery below 80%. If it says 90% and I plug it in? It'll charge it fully right away.
    - GeekyBear 3y ago
      That's not how Apple's implementation works. It doesn't charge the battery over 80% at all, unless it detects that you have a normal waking time, in which case it charges fully right before you normally wake up. Unfortunately, other companies copied the 80% charge bit without copying the part about figuring out if you have a normal waking time and giving you a full charge right before that. For instance, Samsung's S23: >Once you turn off the battery protection function, you'll be able to charge your battery up to 100% https://www.samsung.com/ae/support/mobile-devices/battery-protection-feature-in-samsung-s23-series/ https://www.samsung.com/ae/support/mobile-devices/battery-pr...
      - vladvasiliu 3y ago
        > It doesn't charge the battery over 80% at all, unless it detects that you have a normal waking time, in which case it charges fully right before you normally wake up. My iPhone disagrees with you. I go to bed and wake up at just about the same time. If I somehow managed to drain the battery below 80%, when I plug it in, it'll charge to 80 and then tell me that by the time I wake up in the morning, it'll be fully charged. Which is the case. But the most common use case, for me, is waking up, leaving the phone plugged in (WFH). Maybe go for a walk around noon, snap a picture or two. Forget to plug it back in and get back to work. Plug it in as I go to bed at 95%. It tops right up, doesn't wait until the morning. > Unfortunately, other companies copied the 80% charge bit without copying the part about figuring out if you have a normal waking time and giving you a full charge right before that. But that's actually what I want. With very, very rare exceptions, I never need a full charge on my phone. Hell, until a few weeks back, I was rocking an iphone 7 with a battery in a questionable state (started bulging). That thing never went below 60% with my use patterns. 60% meant night out, so a hefty dose of maps use. Normal days, it didn't go below 85-90%. I think the issue is that Apple expects that when you wake up in the morning, you unplug your phone for the day and actually use it a significant amount. Which isn't my case at all. If I don't leave my house, it'll stay plugged in. I usually forget about my phone since everything I need to do, I do on my computer. For the occasional phone call, I can either keep it plugged in (the cord is long enough) or it's already connected to my headset, so don't even need to go fetch the phone. If I don't go to work, it can stay plugged in for days on end (I don't always grab it when I go out).

vladvasiliu 3y ago

It's a bit different, though. I don't often need my iphone to last multiple days on end. Yet, if I keep it plugged in as often as I'm sitting at a desk, it'll never go below 80%. If I get it below 80%, sooner or later, it will figure "i want to use it" and will charge it all the way to 100%. The lowest my battery ever got on this phone was 40 something when I was away for a weekend without a charger. It's very rare I use it a lot, so the "intelligence" clearly doesn't care how long the battery needs to last. The way it's implemented on my mom's android, it always shows 80 or 85% (can't recall which one it is), even if she leaves it plugged in for the whole weekend. On my HP laptop, if I activate the "battery saver mode" (as opposed to "AI"), it reports the maximum capacity as somewhere around 80% of the design capacity. I don't know whether Linux cooperates with this, but probably not. HP only talks about OS compatibility for the "AI" mode, which not only requires Windows but a specific HP app.

GeekyBear 3y ago
> It's a bit different, though. Yes. It learns your normal waking time (if you have one) and gives you a full charge before you wake up. Which is what I want. A full charge for the working day, without needlessly shortening the batteries functional lifetime.
- vladvasiliu 3y ago
  Sure, but if I know I won't drain my battery more than 10% that day, I can't tell it not to top it up more than 80%. That's the case for me 99.9% of days. This also seems to work only if you've drained the battery below 80%. If it says 90% and I plug it in? It'll charge it fully right away.
  - GeekyBear 3y ago
    That's not how Apple's implementation works. It doesn't charge the battery over 80% at all, unless it detects that you have a normal waking time, in which case it charges fully right before you normally wake up. Unfortunately, other companies copied the 80% charge bit without copying the part about figuring out if you have a normal waking time and giving you a full charge right before that. For instance, Samsung's S23: >Once you turn off the battery protection function, you'll be able to charge your battery up to 100% https://www.samsung.com/ae/support/mobile-devices/battery-protection-feature-in-samsung-s23-series/ https://www.samsung.com/ae/support/mobile-devices/battery-pr...
    - vladvasiliu 3y ago
      > It doesn't charge the battery over 80% at all, unless it detects that you have a normal waking time, in which case it charges fully right before you normally wake up. My iPhone disagrees with you. I go to bed and wake up at just about the same time. If I somehow managed to drain the battery below 80%, when I plug it in, it'll charge to 80 and then tell me that by the time I wake up in the morning, it'll be fully charged. Which is the case. But the most common use case, for me, is waking up, leaving the phone plugged in (WFH). Maybe go for a walk around noon, snap a picture or two. Forget to plug it back in and get back to work. Plug it in as I go to bed at 95%. It tops right up, doesn't wait until the morning. > Unfortunately, other companies copied the 80% charge bit without copying the part about figuring out if you have a normal waking time and giving you a full charge right before that. But that's actually what I want. With very, very rare exceptions, I never need a full charge on my phone. Hell, until a few weeks back, I was rocking an iphone 7 with a battery in a questionable state (started bulging). That thing never went below 60% with my use patterns. 60% meant night out, so a hefty dose of maps use. Normal days, it didn't go below 85-90%. I think the issue is that Apple expects that when you wake up in the morning, you unplug your phone for the day and actually use it a significant amount. Which isn't my case at all. If I don't leave my house, it'll stay plugged in. I usually forget about my phone since everything I need to do, I do on my computer. For the occasional phone call, I can either keep it plugged in (the cord is long enough) or it's already connected to my headset, so don't even need to go fetch the phone. If I don't go to work, it can stay plugged in for days on end (I don't always grab it when I go out).